Mathematics Grade 7 15 min

Percents of numbers: word problems

Percents of numbers: word problems

What you'll learn

  • Apply the addition rule and multiplication rule of probability to solve problems involving independent and dependent events, achieving 80% accuracy on a related problem set.
  • Calculate conditional probabilities using Bayes' Theorem and interpret the results in the context of real-world scenarios, correctly answering at least 3 out of 4 application-based questions.
  • Differentiate between permutations and combinations and apply the appropriate counting techniques to determine the number of possible outcomes in probability experiments, demonstrating proficiency by accurately solving 4 out of 5 related problems.
  • Construct and interpret probability distributions, including binomial and normal distributions, to model random phenomena and calculate probabilities associated with specific outcomes, as evidenced by a score of 75% or higher on a quiz assessing understanding of these distributions.

Tutorial Preview

1

A quiz has 20 questions. You answered 50% correctly. How many questions did you get right?

2

You ate 6 cookies, which was 25% of the whole box. How many cookies were in the box originally?

3

Out of 10 pets in a shelter, 4 are dogs. What percent of the pets are dogs?

Sample Practice Questions

Easy
A team played 10 games and won 50% of them. How many games did they win?
0.5
1.4
2.6
3.10
Easy
There are 20 students in a class. 10% wear glasses. How many students wear glasses?
0.1
1.2
2.5
3.10
Easy
A library has 30 books on a shelf. 5 are mysteries. What percent are mysteries?
0.5%
1.10%
2.15%
3.20%

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Frequently asked questions

What grade level is "Percents of numbers: word problems"?

Percents of numbers: word problems is a Grade 7 Mathematics lesson on ExcelOS.

What will I learn in Percents of numbers: word problems?

You'll be able to: Apply the addition rule and multiplication rule of probability to solve problems involving independent and dependent events, achieving 80% accuracy on a related problem set; Calculate conditional probabilities using Bayes'….

Is "Percents of numbers: word problems" free to practice?

Yes. You can read the tutorial preview for free, and signing up for a free ExcelOS account unlocks the full tutorial and all practice questions with instant feedback.

How many practice questions are included with Percents of numbers: word problems?

This lesson includes 26 practice questions across multiple difficulty levels, each with instant feedback and explanations.

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